Introduction to Lazy Cache

Lazy Cache is a powerful caching library designed to enhance performance by storing and retrieving data efficiently. It simplifies the process of caching in your applications, making it easier to integrate a reliable cache mechanism without reinventing the wheel.

Basic Usage

  import lazyCache from 'lazy-cache';
  const cache = lazyCache();

  // Adding values to the cache
  cache.set('key1', 'value1');
  cache.set('key2', 'value2');

  // Retrieving values from the cache
  const value1 = cache.get('key1');  // returns 'value1'
  const value2 = cache.get('key2');  // returns 'value2'

Advanced API Examples

Custom Expiration

  cache.set('key3', 'value3', {expire: 5000}); // expires in 5 seconds
  setTimeout(() => {
    const value = cache.get('key3');  // returns undefined after 5 seconds
  }, 6000);

Removing Values

  cache.set('key4', 'value4');
  cache.remove('key4');
  const value = cache.get('key4');  // returns undefined

Checking Cache Presence

  cache.set('key5', 'value5');
  const hasKey = cache.has('key5');  // returns true

Clearing the Cache

  cache.set('key6', 'value6');
  cache.clear();
  const value = cache.get('key6');  // returns undefined

Application Example Using Lazy Cache

Below is a sample application that demonstrates the integration of Lazy Cache for improving performance by caching API response data.

  import lazyCache from 'lazy-cache';
  import fetch from 'node-fetch';

  const cache = lazyCache();

  async function fetchData(url) {
    if (cache.has(url)) {
      return cache.get(url);
    }

    const response = await fetch(url);
    const data = await response.json();
    cache.set(url, data, {expire: 60000}); // Cache for 1 minute
    return data;
  }

  // Example usage
  fetchData('https://api.example.com/data')
    .then(data => console.log('Fetched data:', data))
    .catch(error => console.error('Error fetching data:', error));

By using Lazy Cache in this manner, the application can avoid redundant network requests, thus improving its performance significantly.

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